Regarding the discussion about lead tubing I submit the following:

http://www.mayoclinic.org/diseases-conditions/lead-poisoning/home/ovc-20275050 
http://www.healthline.com/health/lead-poisoning 
https://en.wikipedia.org/wiki/Lead_poisoning 

Also, antimony and tin are also quite toxic.  These "heavy metals" are
regulated in many countries to the point where they are prohibited in
many applications.  Processing lead is also prohibited in many areas.
Lead had been processed in Missouri for generations.  The area was so
contaminated cleanup has cost billions of US dollars.

Lastly, when were you last tested for lead?  Many over the age of 40
might be surprised at the level of lead in their body.

Proceed throwing brickbats.

Bill Budenholzer